Packing mat and production method

FIELD: protective arrangements for foundations or foundation structures, particularly watertight packings.

SUBSTANCE: packing mat comprises base, open-cell foam plastic material connected to the base and covering web. Opened foam plastic cells are filled with swelling clay. Covering web is connected to the base by means of seams. The base and the foam plastic material are made as a single sheet having 3-10 mm thickness. The sheet has sealed shell arranged from the first sheet side and opened cells located from another sheet side. Cell lengths, widths and depths are from 1 mm to nearly 10 mm. Packing mat production method is also disclosed.

EFFECT: increased time of clay drying, prevention of crack formation in clay layer.

8 cl, 3 dwg

 

The invention relates to filled at least partially with bentonite or other highly swellable clay sealing Mat with frame and cover cloths, interconnected by joints, and swellable clay in the form of a powder or granulate is placed in a layer of foam with open cells, and to a method for sealing Mat.

Sealing mats of this type is known from published descriptions of the invention to unaccepted applications DE 19738169 and DE 19858180 A.

In order powder or granular bentonite during transport and laying of mats, for example, a width of 4 m and a length of 30 m was retained position, the mate laid out according to the description of the invention DE 19738169 AND razbunarea clay introduced into the nonwoven agromaterials or in the layer of foam with open cells, and the textile base, the intermediate layer of razboieni clay and textile top cloth are interconnected by passing in the longitudinal direction of the sealing Mat joints with a gap of 20 to 50 mm

Also sealing Mat laid out according to the description of the invention DE 19858180 AND consists of a lower base of narrow woven products, located on top of it structural layer formed by a loose layer of nonwoven material or a layer of foam with open cells or cellular structure, which is swellable clay, cover paintings, consisting, as the basis of narrow woven products. And here the Foundation, intermediate layer and cover fabric are interconnected arranged in parallel in the longitudinal direction of the seams.

In relation to known sealing mats is the risk that in the bentonite layer may be formed of shrinkage cracks in the case, when after swelling bentonite comes long dry period and as a result of this clay material loses moisture. Such shrinkage cracks can have the effect that when a sudden ingress of water is leaching, in which the sealing Mat becomes substantially unpressurized.

In order to prevent the formation of such cracks or cracks from drying out in DE 19649628 A1 it is suggested to place between the two containing razbujeny clay layers of elastic foam with open cells layer that violate water balance consisting of non-woven material or a layer of elastic foam with open cells and covered or filled on one or both sides vadodaria polymer. Violating the capillarity layer may also be elastic foam with open cells, which on one or both sides provided with a film or membrane. In this material, consisting of more than three layer is, the layer of foam with open pores and coating may also form the basis.

The objective of the invention is to provide a sealing Mat of the type specified above, which substantially prevents the formation of shrinkage cracks and erosion of these cracks without having to use two bentonite layers, separated not dependent on water balance layer or violate kapilyarnosti layer.

The problem is solved according to the invention in the sealing material containing a base on which is located the foam material with open cells, filled with a swellable clay, and fine linen, and cover fabric are connected through joints, characterized in that the base and the foam material with open cells are made in the form of a single blade thickness of from 3 to 10 mm, which has a closed shell with one hand and open cells on the other, the length, width and depth of the cells is from 1 to a value less 10 mm due To the fact that the swellable clay is only in the open with one hand cells of the foam material, on the one hand substantially delayed full drying clay swelling due to water absorption, and the walls of the cell and closed-shell fabric eliminate the erosion of cracks in the layer is clay, resulting prevents erosion of the sealing Mat.

Preferably, the layer of foam material with open cells and closed-shell was soft and supple and contained listoveska outer shell. Such foam material after filling the swellable clay is closed with a top layer consisting mainly of non-woven material or narrow woven products. Connecting the base with top canvas seams it is advisable to position in the longitudinal direction at a distance of 20-50 mm from each other. In order to prevent breakdown of the closed shell fabric it is advisable to reinforce the foam material, in particular a closed shell, short, glass, mineral or plastic fibers.

To ensure the sealing ability of the Mat to the perception on both sides of the large mechanical loads closed shell fabric is hardened textile reinforcing fabric, which together with the canvas, filled at least partially swellable clay, made with top of the canvas. The canvas can also be pasted on the textile reinforcing cloth before filling swellable clay or have any other planar connection. This can be ensured due to the fact that, for example, the cloth is produced by application of the foam on reinforcing p. the pilot, with which it is associated with a reinforcing cloth of his closed shell.

It is advisable to produce a fabric with one side open cells and closed shell of the fabric of double thickness, containing a closed shell on both sides and divided at its mid-plane. On the basis of experience it is known that the integral or structural foams contain on both sides of the closed shell, and the core with open cells, and the diameter of the cells decreases from the center to the edge. If such foam material divided by its Central plane, relatively large cells are completely open, so that the canvas can easily be filled with a swellable clay. Shaking or kneading foam material, it is possible to increase the degree of filling.

In the following description are explained in more detail examples of carrying out the invention with reference to the drawings. This is depicted on:

figure 1 is a perspective view of the sealing Mat according to the invention;

figure 2 is a top view of the sealing Mat, in which a closed outer shell foam fabric reinforced with cloth of tissue;

figure 3 - schematic representation of the process of obtaining the foam fabric with open cells and closed outer shell.

the AK can be seen from figure 1, the base 1 consists of elastic fabric with a closed shell 4 and open cells 5 filled with a swellable clay, and from top cloth 2, tabbed filled swellable clay foam material. Seams 3 are arranged in the longitudinal direction of the sealing Mat at a distance of 20 or 30 mm from each other. In order also closed shell 4 was able to perceive increased local loads, canvas and, in particular, the outer casing 4 is reinforced by fibers. As a material for the base 1 of foam are used, in particular, polyethylene, polypropylene or polyamide.

As shown in figure 2, to strengthen the closed shell 4 canvases can be applied textile reinforcing cloth 6, which together with filled with a swellable clay foam material sewn with top canvas 2. Seams 3 are designed so that the closed shell 4 or reinforcing cloth 6 is located on top of the blade 2 at a distance which approximately corresponds to the thickness of the canvas.

As shown in figure 3, for receiving the blade with a closed outer casing 4 and open cells 5 first made canvas 10 double thickness, containing both sides of a closed shell. After curing of this foam blade 10 it is divided by the median plane 11. Razdelenieto be made by cutting, by sawing or using a hot wire or laser beam. After this the foam panels can nakativaetsa and fed to further processing.

1. Sealing Mat containing the base (1), a foam material with open cells, filled with a swellable clay, and cover sheet (2)and cover sheet (2) is connected to the base (1) by means of joints (3), characterized in that the base and the foam material with open cells are made in the form of a single blade thickness of from 3 to 10 mm, which has a closed shell with one hand and open cells on the other, the length, width and depth of the cells is from 1 mm to a value less 10 mm

2. Sealing Mat according to claim 1, characterized in that the closed shell (4) canvas reinforced with fibers.

3. Sealing Mat according to claim 1 or 2, characterized in that the closed shell (4) fabric reinforced textile reinforcing cloth (6), which, together with at least partially filled with a swellable clay canvas stitched with cover canvas.

4. Sealing Mat according to claim 3, characterized in that the canvas with a closed shell (4) pasted on textile reinforced canvas.

5. Sealing Mat according to claim 3, characterized in that the foam cloth is obtained by applying the foam to a reinforcing fabric (6) and provide them internally is its connection between them in the closed area of the outer shell (4).

6. Sealing Mat according to claim 1, characterized in that the fabric made of polyethylene, polypropylene or polyamide.

7. A method of obtaining a sealing Mat according to any one of claims 1 to 6, characterized in that the manufacture of the foam blade carried out by extrusion, foaming between the conveyor belts (12, 13), curing and after curing to make a separation in the median plane, and open on one side of the cell formed thereby foundations enter swellable clay.

8. The method according to claim 7, characterized in that between the foamed layer of plastic and conveyor belts (12, 13) are ignored textile reinforcing cloth (6), ensuring their connection with closed shells (4) of the canvas.



 

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